/**
 * Copyright (C)  Gadglet .
 *
 * This file is part of Gadglet
 *
 * Gadglet is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Gadglet is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Gadglet. If not, see <http://www.gnu.org/licenses/>.
 */
package com.gadglet.client.gwt.core.ui;

import com.gadglet.client.gwt.core.GadgletQuery;
import com.gadglet.client.gwt.core.GadgletRequest;
import com.gadglet.client.gwt.core.GadgletResponse;
import com.gadglet.client.gwt.ui.DebugDialogBox;
import com.gadglet.client.gwt.ui.UIUtils;
import com.gadglet.params.ProfileFields;
import com.gadglet.params.ReqActionTypes;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.gadgets.client.impl.PreferencesUtil;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;




/**
 * Create the user friends list. Used only in Bizlets (Google Apps) 
 *
 */

public class DomainFriendsPanel {
DebugDialogBox debug = DebugDialogBox.getErrorNotifier();
	
	protected final PreferencesUtil prefs = PreferencesUtil.nativeInitPrefs();
	
	private final VerticalPanel domainFrindsContainer = new VerticalPanel();
	private final VerticalPanel domainFrindsList = new VerticalPanel();

		
	final GadgletQuery viewFriendsQry = new GadgletQuery();

	final ViewFriendsRequest viewFriendsRequest = new ViewFriendsRequest(
			viewFriendsQry);
		
	final GadgletQuery removeFriendQry = new GadgletQuery();
	
	final RemoveFriendRequest removeFriendRequest = new RemoveFriendRequest(
			removeFriendQry);
	
		
	private static DomainFriendsPanel domainFriendsPanel = null;
	
	public VerticalPanel getDomainFrindsContainer(){
		return this.domainFrindsContainer;
	}
		
	
	public static DomainFriendsPanel getDomainFriendsPanel() {
		if (domainFriendsPanel == null) {
			domainFriendsPanel = new DomainFriendsPanel();
		}
		return domainFriendsPanel;
	}
	
	DomainFriendsPanel(){
		
		removeFriendQry.setRequestAction(ReqActionTypes.REMOVE_FRIEND);
		
		domainFrindsContainer.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);

		Label remoteFrindsLabel = new Label();
		remoteFrindsLabel.setWidth("250px");
		remoteFrindsLabel.setStylePrimaryName("friendsLabel");
		remoteFrindsLabel.setText(prefs.getMsg("gadgetLabelGadgetFriends") );
		
		domainFrindsContainer.add(remoteFrindsLabel);
		domainFrindsContainer.add(domainFrindsList);
			
	}
	
	public void viewDomainFriends(){
		domainFrindsList.clear();
		viewFriendsQry.setRequestAction(ReqActionTypes.GET_FRIENDS);
		viewFriendsRequest.makeRequest();
		
	}
	

	
	
	/**
	 * Request class used to handle the results of the user domain frinds list
	 *
	 */
	public class ViewFriendsRequest extends GadgletRequest {
		ViewFriendsRequest(GadgletQuery req) {
			super(req);
		}

		@Override
		protected void processResults(GadgletResponse jResponse) {

			if (jResponse.isSuccessful()) {
	
				int inviteNum = jResponse.getRootItemsNum();
				
				

				for (int index = 0; index < inviteNum; index++) {
					JSONObject item = jResponse.getItem(index);
								
					String photo = null;
					String nickName = null;
					String title= null;
					String userId = null;
					
					if(item.get(ProfileFields.PROFILE_THUMBNAILURL.getParamName())!=null)
						photo = item.get(ProfileFields.PROFILE_THUMBNAILURL.getParamName()).isString().stringValue();
					
					if(item.get(ProfileFields.PROFILE_NICKNAME.getParamName())!=null)
						nickName = item.get(ProfileFields.PROFILE_NICKNAME.getParamName()).isString().stringValue();
				
					if(item.get(ProfileFields.PROFILE_TITLE.getParamName())!=null)
						title = item.get(ProfileFields.PROFILE_TITLE.getParamName()).isString().stringValue();
					
					if(item.get(ProfileFields.PROFILE_FRIEND_ID.getParamName())!=null)
						userId = item.get(ProfileFields.PROFILE_FRIEND_ID.getParamName()).isString().stringValue();

					try {
						DomainUser domainUserFriend = new DomainUser(nickName,photo,title,userId);
						domainFrindsList
								.add(domainUserFriend.getRemoteFriendItem());
					} catch (Exception e) {
						debug.showError(111, e.getMessage());
					}
				}

			} else
				debug.showError(101, jResponse.getError());
			
			
		}
	}
	
	
	/**
	 * Class represents a single Domain user which is a friend of the current user.
	 *
	 */
	private class DomainUser {

	private String invitedByNickName;
		
		private String friendPhoto;
		
		private String title;
		
		private final String userId;

		public DomainUser(
				String invitedByNickName, String photo, String title, String userId) {
			this.friendPhoto = photo;
			this.title = title;
			this.invitedByNickName = invitedByNickName;
			this.userId = userId;
		}


		HorizontalPanel getRemoteFriendItem() {
			HorizontalPanel item = new HorizontalPanel();
			VerticalPanel name = new VerticalPanel();
			
			name.add(new HTML(invitedByNickName));
			name.add(new HTML(title));
			
			
			item.setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE);
			item.add(name);
			item.add(UIUtils.getSpace());
			
			if(this.friendPhoto!=null && this.friendPhoto.length()>0){
				Image img = new Image(this.friendPhoto);
				img.setPixelSize(30, 30);
					item.add(img);
				
				item.add(UIUtils.getSpace());
			}
			
			if(userId!=null && !userId.isEmpty()){
			final Button removeButton = new Button(prefs.getMsg("gadgetLabelRemove"));
			removeButton.addClickHandler(new ClickHandler() {
				@Override
				public void onClick(ClickEvent event) {
					
					removeFriendQry.clearParamList();
					removeFriendQry.addParam(ProfileFields.PROFILE_FRIEND_ID.getParamName(), userId);
					
					removeFriendRequest.makeRequest();
				
				}
			});
			
			item.add(removeButton);
			}
			
			
			return item;
		}

	}
	
	/**
	 * A Request class use to remove a friend from the current user friends list
	 *
	 */
	public class RemoveFriendRequest extends GadgletRequest {
		RemoveFriendRequest(GadgletQuery req) {
			super(req);
		}

		@Override
		protected void processResults(GadgletResponse data) {
			GadgletResponse jResponse = data;

			if (jResponse.isSuccessful()) {
		
				// refresh
				viewDomainFriends();
				

			} else {

				debug.showError(101, jResponse.getError());
			}

		}
	}
	

}
